Improvement in continuous metallic lathing



ORNELL.

METALLIG LATHING.

No. 19,487. Patented Mar. 2, 1858.

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UNITED STATES PATENT OFFICE.

BIRDSALL CORNELL, OF NEXV YORK, N. Y.

IMPROVEMENT IN CONTINUOUS METALLIC LATHlNG.

Specification forming part of Letters Fatent No. 19,487, dated March 2, 1858.

To all whom it may concern.-

Be it known that I, BIRDSALL CORNELL, of the city, county, and State of NewYorlghave invented an Improved Metallic Surface for Receiving and Supporting a Coating of Plaster, &c., to be used in the construction of fireproof and burglar-proof partitions; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making a part of this specification.

Figure 1 is a side view of the said surface; Fig. 2, a section in the line to a: of Fig. 1; Fig. 3, a section in the line y y of Fig. 1, and Fig. 4 a section of a modified form of the metallic sheet used in the construction of the said improved plaster-supporting surface.

Similar letters indicate like parts in each drawing.

My improved metallic surface for the reception and retention of a coati n g of plaster, &c., is composed of sheets of metal b, of suitable thickness, after the said sheets have been swaged into alternating depressions and elevations of a dovetail shape or other suitable shape, substantially as represented in the accompanying drawings. The said sheets may be secured to uprights a, made of strips of thick sheet-iron bent into the shape represented in the drawings, or to any other suitable supports.

The bending of sheet metal into the abovedescribed shape serves the purpose of stiffening and strengthening the same, and consequently sheets thus shaped form asurface for the reception of a coating of plaster that is less liable to be injured by the action of a high temperature than any other description of metallic surfaces used for a similar purpose, at the same time that the said surface affords a better protection against the depredations of burglars, and can be furnished at a lower price than other plaster-bearing metallic surfaces.

I am aware that narrow angular strips of sheet metalhave been combined with each other in such a manner as to form surfaces for the reception of a coating of plaster, and that patents have been granted to Palmer Sumner and to John B. Cornell for varieties of such combinations.

Therefore I wish it to be distinctly understook that what I claim as myinvention, and desire to secure by Letters Patent, is-

Forming metallic surfaces for the reception of coatings of plaster, &c., of sheets of metal after they have been swaged into alternating elevations and depressions of a retaining shape, substantially as represented in the accompanying drawings.

The ahove specification of my improved method of forming metallic surfaces for the reception of plasterer cement signed and Witnessed this 26th day of January, 1858.

BIRDSALL CORNELL.

Witnesses:

CHARLES H. FIELD, I. L. CADY. 

